We included HMH Into Math Grade 2 Answer Key PDF Module 1 Lesson 2 Develop Fluency with Addition Using Mental Strategies and Properties to make students experts in learning maths.
HMH Into Math Grade 2 Module 1 Lesson 2 Answer Key Develop Fluency with Addition Using Mental Strategies and Properties
I Can add in any order, add zero, and use strategies to find sums.
Spark Your Learning
Choose two numbers. How can you show the sum of the numbers?
Answer:
Explanation:
The numbers i chose are 9 and 5
The addition facts are 9 + 5 = 14, 5 + 9 = 14.
Have children work in pairs. Read the following: Choose two numbers. How can you show the sum of the numbers you choose? Hove children write two addition facts to represent the sum.
Build Understanding
Francie draws 7 pictures on Monday. She draws 5 pictures on Tuesday. How many pictures does she draw?
A. How can you use tools to show the problem?
Answer:
Explanation:
7 + 5 = 12
Francie have 12 pictures.
B. What addition fact can you use to solve this problem?
___ + ____ = _____
Answer:
7 + 5 = 12
C. How can you change the order of the addends to write a related addition fact?
Answer:
7 + 5 = 12
5 + 7 = 12
12 – 5 = 7
12 – 5 = 7
D. How many pictures does Francie draw?
____ pictures
Answer:
7 + 5= 12
Francie drew 12 pictures.
Mr. Weston picks 6 red tulips and 8 white tulips from his garden. How many tulips does he pick?
A. How can you write related addition facts to solve the problem?
___ + ___ = ____
___ + ___ = ____
Answer:
6 + 8 = 14
8 + 6 = 14
B. Solve. Mr. Weston picks ___ tulips.
Answer:
6 + 6 = 12, 12 + 2= 14
6 + 8 = 14
Explanation:
Mr. Weston picked 14 tulips
José has 8 red blocks. He has 0 green blocks. How many blocks does he have?
A. How can you show this problem?
Answer:
B. What addition fact can you use to solve this problem?
___ + ___ = _____
Answer:
8 + 0 = 8
0 + 8 = 8
C. Solve. Jase has ___ blocks.
Answer:
8 + 0 = 8
Explanation:
Jase has 8 blocks.
Turn and Talk What do you know about the sum when you add 0 to a number?
Step It Out
1. There are 9 frogs in a pond. There are 3 frogs on the shore. How many frogs are there?
A. Make a concrete model of the problem. Draw to show what you did.
Answer:
B. Count on to add. Start at q, Count on 3.
9, ___, ___, ____
Answer:
9, 12, 15, 18
C. Write an addition fact to show the problem. Solve.
___ + ___ = ____ ____ frogs
Answer:
9 + 3 = 12
Explanation:
9 + 3 =
Make ten:
9 + 1 = 10, 10 + 2 = 12
There are 12 frogs.
Check Understanding Math Board
Question 1.
There are 8 toy rockets and 7 dolls in a toy box. How many toys are in the toy box? ____ toys
Answer:
15 toys
Explanation:
8 + 7 = 15
Make ten:
8 + 2 = 10, 10 + 5 = 15
There are 15 toys in the toy box.
Find the sum.
Question 2.
___ = 9 + 2
Answer:
11
Explanation:
9 + 2 = 11
Make ten:
9 + 1 = 10, 10 + 1= 11
The sum of 9 and 2 is 11.
Question 3.
o + 5 = ___
Answer:
5
Explanation:
0 + 5 = 5
the sum of 0 and 5 is 5.
On Your Own
Question 4.
Attend to Precision There are 8 roses on one rose bush. On another rose bush, there are 2 roses. How
many roses are there? Explain the strategy you used.
Answer:
10
Explanation:
8 + 2 = 10
There are 10 roses.
Question 5.
Reason There are 4 white goats in a field. There are 7 brown goats. How many goats are in the field?
___ goats
Answer:
11
Explanation:
4 + 7 = 11
Make ten:
4 + 6 = 10, 10 + 1= 11
There are 11 goats in the field.
Use Structure Find the sum.
Question 6.
6 + 2 = ____
Answer:
8
Explanation:
6 + 2 = 8
The sum of 6 and 2 is 8.
Question 7.
0 + 6 = ____
Answer:
6
Explanation:
0 + 6 = 6
The sum of 0 and 6 is 6.
Question 8.
___ = 3 + 8
Answer:
11
Explanation:
3 + 8 = 11
Make ten:
3 + 7 = 10, 10 + 1= 11
The sum of 3 and 8 is 11.
Question 9.
___ = 8 + 8
Answer:
16
Explanation:
8 + 8 = 16
Make ten:
8 + 2 = 10, 10 + 6 = 16.
The sum of 8 and 8 is 16.
Question 10.
Open Ended What addition strategy would you choose to solve 3 + 9? Explain why.
Answer:
Mental addition strategy
Explanation:
3 + 9 =
Make ten:
3 + 7 = 10, 10 + 2 = 12
So, 3 + 9 = 12.
On Your Own
Use Structure Solve. Show your work.
Question 11.
There are 9 children at one table. There are 0 children at another table. How many children are there?
___ children
Answer:
9
Explanation:
9 + 0 = 9
There are 9 children.
Question 12.
Malik has 6 horse puzzles and 5 cat puzzles. How many puzzles does she have?
____ puzzles
Answer:
11 puzzles
Explanation:
6 + 5 =
Make ten:
6 +4 = 10, 10 + 1= 11
There are 11 puzzles with Malik.
Use Repeated Reasoning Find the sum.
Question 13.
4 + 3 = ___
Answer:
7
Explanation:
4 + 3 = 7
The sum of 4 and 3 is 7.
Question 14.
___ = 7 + 2
Answer:
9
Explanation:
7 + 2 = 9
The sum of 7 and 2 is 9.
Question 15.
___ = 8 + 4
Answer:
12
Explanation:
8 + 4 = 12
Make ten: 8 + 2 = 10, 10 + 2 = 12.
The sum of 8 and 4 is 12.
Question 16.
7 + 0 = ____
Answer:
7
Explanation:
The sum of 7 and 0 is 7.
I’m in a Learning Mindset!
What did I learn in addition to practicing related facts?
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